Automotive 500mA 40V High-Voltage Ultralow-Quiescent-Current Watchdog LDO - TPS7B6833-Q1

TPS7B6833-Q1 (ACTIVE)

Automotive 500mA 40V High-Voltage Ultralow-Quiescent-Current Watchdog LDO

 

Description

In automotive microcontroller or microprocessor power-supply applications, the watchdog is used to monitor the microcontroller working status to prevent software runaway. It is necessary for the watchdog to be independent of the microcontroller in a reliable system.

The TPS7B68xx-Q1 device is a family of 500-mA watchdog LDOs designed for an operating voltage up to 40 V, with typical quiescent current of only 19 µA at light load. The devices integrate a programmable function for selecting a window or standard watchdog, with an external resistor to set the watchdog time within 9% accuracy.

The PG pin on the TPS7B68xx-Q1 devices indicate when the output voltage is stable and in regulation. The power-good delay period and power-good threshold can be adjusted by external components. The devices also feature an integrated short-circuit and overcurrent protection. The combination of such features makes these devices particularly flexible and suitable to supply microcontroller systems in automotive applications.

For all available packages, see the orderable addendum at the end of the data sheet.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • Maximum Output Current: 500 mA
  • 4-V to 40-V Wide VIN Input-Voltage Range With Up to 45-V Transients
  • Fixed 3.3-V and 5-V Outputs
  • Maximum Dropout Voltage: 600 mV at 500 mA
  • Stable With Output Capacitor in Wide-Range of Capacitance (4.7 µF to 500 µF) and ESR (0.001 Ω to 20 Ω)
  • Low Quiescent Current (I(Q))
    • < 4 µA When EN Is Low (Shutdown Mode)
    • 19 µA Typical at Light Loads With WD_EN High (Watchdog Disabled)
  • Configurable for Window Watchdog or Standard Watchdog
  • Open-to-Closed Window Ratio Configurable as 1:1 or 8:1
  • Fully Adjustable Watchdog Period (From 10 ms to 500 ms)
  • 9% Accurate Watchdog Period
  • Dedicated WD_EN Pin to Control Watchdog ON-OFF
  • Fully Adjustable Power-Good Threshold and Power-Good Delay Period
  • Low Input-Voltage Tracking to UVLO
  • Integrated Fault Protection
    • Overload Current-Limit Protection
    • Thermal Shutdown
  • 28-Pin HTSSOP Package

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Parametrics Compare all products in Single Channel LDO

 
Iout (Max) (A)
Output Options
Vin (Min) (V)
Vin (Max) (V)
Fixed Output Options (V)
Vout (Min) (V)
Vout (Max) (V)
Iq (Typ) (mA)
Vdo (Typ) (mV)
Accuracy (%)
PSRR @ 100KHz (dB)
Output Capacitor Type
Rating
Operating Temperature Range (C)
Pin/Package
TPS7B6833-Q1 TPS7A6301-Q1 TPS7A6333-Q1 TPS7A6350-Q1 TPS7A6401-Q1 TPS7B6350-Q1 TPS7B6850-Q1
0.5    0.3    0.3    0.3    0.3    0.3    0.5   
Fixed Output    Adjustable Output    Fixed Output    Fixed Output    Adjustable Output    Fixed Output    Fixed Output   
4    4    4    5.3    4    4    4   
40    40    40    40    40    40    40   
3.3      3.3    5      5    5   
3.3    2.5    3.3    5    2.5    5    5   
3.3    7    3.3    5    7    5    5   
0.019    0.035    0.035    0.035    0.035    0.019    0.019   
350    300    300    300    300    300    350   
2    2    2    2    2    2    2   
40    40    40    40    40    40    40   
Ceramic
Non-Ceramic   
Ceramic    Ceramic    Ceramic    Ceramic    Ceramic
Non-Ceramic   
Ceramic
Non-Ceramic   
Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
28HTSSOP    14HTSSOP    10VSON
14HTSSOP   
14HTSSOP    14HTSSOP    16HTSSOP    28HTSSOP   

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